package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    //新增套餐和相关菜品
    @Override
    @Transactional
    public void saveWithFlavor(SetmealDTO setmealDTO) {
        Setmeal setmeal= new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        //向套餐表插入1条数据
        setmealMapper.insert(setmeal);

        //获取insert语句生成的主键值
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishs = setmealDTO.getSetmealDishes();
        if (setmealDishs != null && setmealDishs.size() > 0) {
            setmealDishs.forEach(setmealDish -> {
                setmealDish.setDishId(setmealId);
            });
            //向菜品表插入n条数据
            setmealDishMapper.insertBatch(setmealDishs);
        }
    }

    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }


    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前套餐是否能够删除——是否起售中
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //根据套餐id集合批量删除菜品
        setmealMapper.deleteByIds(ids);
        //根据套餐id集合批量删除关联的口味数据
        setmealDishMapper.deleteBySetmealIds(ids);
    }

    @Override
    public SetmealVO getByIdWithFlavor(Long id) {
        //根据di查询套餐数据
        Setmeal setmeal = setmealMapper.getById(id);
        //根据套餐id查询菜品
        List<SetmealDish> SetmealDish = setmealDishMapper.getByDishId(id);
        //根据查询到的数据封装到VO
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(SetmealDish);

        return setmealVO;
    }

    //修改套餐和对应菜品
    @Override
    public void updateWithFlavor(SetmealDTO setmealDTO) {
        Setmeal setmeal= new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);
        setmealDishMapper.deleteByDishId(setmealDTO.getId());
        List<SetmealDish> dish = setmealDTO.getSetmealDishes();
        if (dish != null && dish.size() > 0) {
            dish.forEach(SetmealDish -> {
                SetmealDish.setSetmealId(setmealDTO.getId());
            });
            //向菜品表插入n条数据
            setmealDishMapper.insertBatch(dish);
        }
    }

    @Override
    public void beginOrEnd(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品，有停售菜品提示"套餐内包含未启售菜品，无法启售"
        if (status == StatusConstant.ENABLE) {
            List<Dish> dishList = dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish -> {
                    if(StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });

            }
        }

        Setmeal setmeal= new Setmeal();
        setmeal.setStatus(status);
        setmeal.setId(id);
        setmealMapper.update(setmeal);

    }
    //条件查询
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    //根据id查询菜品选项
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}

